/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 19:14:43,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 19:14:43,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 19:14:43,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 19:14:43,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 19:14:43,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 19:14:43,539 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 19:14:43,542 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 19:14:43,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 19:14:43,547 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 19:14:43,548 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 19:14:43,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 19:14:43,551 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 19:14:43,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 19:14:43,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 19:14:43,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 19:14:43,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 19:14:43,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 19:14:43,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 19:14:43,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 19:14:43,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 19:14:43,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 19:14:43,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 19:14:43,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 19:14:43,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 19:14:43,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 19:14:43,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 19:14:43,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 19:14:43,610 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 19:14:43,625 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 19:14:43,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 19:14:43,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 19:14:43,627 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 19:14:43,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 19:14:43,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 19:14:43,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 19:14:43,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 19:14:43,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 19:14:43,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 19:14:43,629 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 19:14:43,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 19:14:43,630 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 19:14:43,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 19:14:43,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 19:14:43,631 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 19:14:43,631 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 19:14:43,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 19:14:43,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 19:14:43,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 19:14:43,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 19:14:43,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 19:14:43,633 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 19:14:44,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 19:14:44,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 19:14:44,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 19:14:44,172 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 19:14:44,173 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 19:14:44,174 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-23 19:14:44,289 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97fb9d7e0/17a94399fdfa470c91053bd85eeec202/FLAG35737da5c [2021-02-23 19:14:45,174 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 19:14:45,175 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-23 19:14:45,196 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97fb9d7e0/17a94399fdfa470c91053bd85eeec202/FLAG35737da5c [2021-02-23 19:14:45,436 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97fb9d7e0/17a94399fdfa470c91053bd85eeec202 [2021-02-23 19:14:45,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 19:14:45,454 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 19:14:45,456 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 19:14:45,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 19:14:45,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 19:14:45,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:14:45" (1/1) ... [2021-02-23 19:14:45,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d916420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:14:45, skipping insertion in model container [2021-02-23 19:14:45,465 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:14:45" (1/1) ... [2021-02-23 19:14:45,474 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 19:14:45,536 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 19:14:45,932 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[13847,13860] [2021-02-23 19:14:46,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:14:46,036 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 19:14:46,179 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[13847,13860] [2021-02-23 19:14:46,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:14:46,327 INFO L208 MainTranslator]: Completed translation [2021-02-23 19:14:46,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:14:46 WrapperNode [2021-02-23 19:14:46,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 19:14:46,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 19:14:46,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 19:14:46,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 19:14:46,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:14:46" (1/1) ... [2021-02-23 19:14:46,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:14:46" (1/1) ... [2021-02-23 19:14:46,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:14:46" (1/1) ... [2021-02-23 19:14:46,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:14:46" (1/1) ... [2021-02-23 19:14:46,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:14:46" (1/1) ... [2021-02-23 19:14:46,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:14:46" (1/1) ... [2021-02-23 19:14:46,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:14:46" (1/1) ... [2021-02-23 19:14:46,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 19:14:46,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 19:14:46,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 19:14:46,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 19:14:46,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:14:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 19:14:46,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 19:14:46,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 19:14:46,629 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 19:14:46,630 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 19:14:46,630 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 19:14:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 19:14:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 19:14:46,631 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 19:14:46,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 19:14:46,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-23 19:14:46,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2021-02-23 19:14:46,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-23 19:14:46,632 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-02-23 19:14:46,632 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 19:14:46,633 INFO L130 BoogieDeclarations]: Found specification of procedure read [2021-02-23 19:14:46,633 INFO L130 BoogieDeclarations]: Found specification of procedure write [2021-02-23 19:14:46,633 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2021-02-23 19:14:46,636 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2021-02-23 19:14:46,637 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2021-02-23 19:14:46,638 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-23 19:14:46,639 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-23 19:14:46,640 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 19:14:46,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 19:14:46,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 19:14:46,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 19:14:46,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 19:14:46,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 19:14:46,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 19:14:48,589 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 19:14:48,589 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 19:14:48,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:14:48 BoogieIcfgContainer [2021-02-23 19:14:48,593 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 19:14:48,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 19:14:48,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 19:14:48,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 19:14:48,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 07:14:45" (1/3) ... [2021-02-23 19:14:48,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765d7f36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:14:48, skipping insertion in model container [2021-02-23 19:14:48,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:14:46" (2/3) ... [2021-02-23 19:14:48,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765d7f36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:14:48, skipping insertion in model container [2021-02-23 19:14:48,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:14:48" (3/3) ... [2021-02-23 19:14:48,613 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-23 19:14:48,623 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 19:14:48,631 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 19:14:48,657 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 19:14:48,706 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 19:14:48,707 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 19:14:48,707 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 19:14:48,707 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 19:14:48,707 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 19:14:48,707 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 19:14:48,708 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 19:14:48,708 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 19:14:48,762 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states. [2021-02-23 19:14:48,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2021-02-23 19:14:48,803 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:14:48,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:14:48,806 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:14:48,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:14:48,815 INFO L82 PathProgramCache]: Analyzing trace with hash -153729234, now seen corresponding path program 1 times [2021-02-23 19:14:48,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:14:48,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249851630] [2021-02-23 19:14:48,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:14:48,956 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:14:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:14:49,885 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:14:49,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:14:49,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:14:49,889 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:14:49,920 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:14:49,922 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 19:14:49,942 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:14:49,943 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:14:50,219 WARN L202 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-02-23 19:14:50,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:14:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:14:50,258 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:14:50,258 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:14:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:14:50,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249851630] [2021-02-23 19:14:50,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:14:50,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 19:14:50,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500171331] [2021-02-23 19:14:50,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 19:14:50,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:14:50,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 19:14:50,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:14:50,780 INFO L87 Difference]: Start difference. First operand 821 states. Second operand 5 states. [2021-02-23 19:14:57,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:14:57,091 INFO L93 Difference]: Finished difference Result 2074 states and 2757 transitions. [2021-02-23 19:14:57,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 19:14:57,093 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 415 [2021-02-23 19:14:57,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:14:57,126 INFO L225 Difference]: With dead ends: 2074 [2021-02-23 19:14:57,127 INFO L226 Difference]: Without dead ends: 1244 [2021-02-23 19:14:57,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 19:14:57,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-02-23 19:14:57,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 1242. [2021-02-23 19:14:57,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1242 states. [2021-02-23 19:14:57,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 1510 transitions. [2021-02-23 19:14:57,383 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 1510 transitions. Word has length 415 [2021-02-23 19:14:57,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:14:57,389 INFO L480 AbstractCegarLoop]: Abstraction has 1242 states and 1510 transitions. [2021-02-23 19:14:57,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 19:14:57,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 1510 transitions. [2021-02-23 19:14:57,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2021-02-23 19:14:57,402 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:14:57,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:14:57,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 19:14:57,403 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:14:57,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:14:57,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1130536267, now seen corresponding path program 1 times [2021-02-23 19:14:57,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:14:57,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915916185] [2021-02-23 19:14:57,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:14:57,411 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:14:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:14:57,585 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:14:57,589 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:14:57,591 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:14:57,594 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:14:57,599 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:14:57,600 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:14:57,905 WARN L202 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-02-23 19:14:57,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:14:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:14:57,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:14:57,934 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:14:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:14:58,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915916185] [2021-02-23 19:14:58,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:14:58,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 19:14:58,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677466802] [2021-02-23 19:14:58,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 19:14:58,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:14:58,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 19:14:58,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 19:14:58,140 INFO L87 Difference]: Start difference. First operand 1242 states and 1510 transitions. Second operand 4 states. [2021-02-23 19:15:03,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:15:03,140 INFO L93 Difference]: Finished difference Result 3331 states and 4111 transitions. [2021-02-23 19:15:03,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 19:15:03,141 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 416 [2021-02-23 19:15:03,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:15:03,156 INFO L225 Difference]: With dead ends: 3331 [2021-02-23 19:15:03,156 INFO L226 Difference]: Without dead ends: 2302 [2021-02-23 19:15:03,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 19:15:03,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2302 states. [2021-02-23 19:15:03,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2302 to 1244. [2021-02-23 19:15:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1244 states. [2021-02-23 19:15:03,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1512 transitions. [2021-02-23 19:15:03,324 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1512 transitions. Word has length 416 [2021-02-23 19:15:03,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:15:03,327 INFO L480 AbstractCegarLoop]: Abstraction has 1244 states and 1512 transitions. [2021-02-23 19:15:03,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 19:15:03,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1512 transitions. [2021-02-23 19:15:03,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2021-02-23 19:15:03,337 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:15:03,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:15:03,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 19:15:03,338 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:15:03,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:15:03,339 INFO L82 PathProgramCache]: Analyzing trace with hash -118669967, now seen corresponding path program 1 times [2021-02-23 19:15:03,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:15:03,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454607453] [2021-02-23 19:15:03,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:15:03,346 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:15:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:15:03,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:03,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:03,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:03,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:15:03,516 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:03,517 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:03,844 WARN L202 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-02-23 19:15:03,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:15:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:15:03,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:03,868 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:15:04,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454607453] [2021-02-23 19:15:04,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:15:04,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 19:15:04,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354555654] [2021-02-23 19:15:04,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 19:15:04,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:15:04,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 19:15:04,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 19:15:04,076 INFO L87 Difference]: Start difference. First operand 1244 states and 1512 transitions. Second operand 4 states. [2021-02-23 19:15:09,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:15:09,221 INFO L93 Difference]: Finished difference Result 3074 states and 3793 transitions. [2021-02-23 19:15:09,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 19:15:09,225 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 417 [2021-02-23 19:15:09,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:15:09,238 INFO L225 Difference]: With dead ends: 3074 [2021-02-23 19:15:09,238 INFO L226 Difference]: Without dead ends: 2250 [2021-02-23 19:15:09,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 19:15:09,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2021-02-23 19:15:09,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2248. [2021-02-23 19:15:09,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2248 states. [2021-02-23 19:15:09,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 2751 transitions. [2021-02-23 19:15:09,434 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 2751 transitions. Word has length 417 [2021-02-23 19:15:09,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:15:09,435 INFO L480 AbstractCegarLoop]: Abstraction has 2248 states and 2751 transitions. [2021-02-23 19:15:09,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 19:15:09,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 2751 transitions. [2021-02-23 19:15:09,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2021-02-23 19:15:09,446 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:15:09,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:15:09,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 19:15:09,447 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:15:09,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:15:09,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1775911439, now seen corresponding path program 1 times [2021-02-23 19:15:09,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:15:09,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784453154] [2021-02-23 19:15:09,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:15:09,454 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:15:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:15:09,698 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:09,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:09,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:09,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:15:09,708 WARN L141 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size [2021-02-23 19:15:09,710 WARN L147 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size 30 [2021-02-23 19:15:09,734 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:09,736 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 19:15:09,752 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:09,753 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:10,071 WARN L202 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-02-23 19:15:10,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:15:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:15:10,117 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:10,118 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:15:10,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784453154] [2021-02-23 19:15:10,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:15:10,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 19:15:10,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071230238] [2021-02-23 19:15:10,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 19:15:10,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:15:10,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 19:15:10,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 19:15:10,261 INFO L87 Difference]: Start difference. First operand 2248 states and 2751 transitions. Second operand 6 states. [2021-02-23 19:15:14,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:15:14,973 INFO L93 Difference]: Finished difference Result 5996 states and 7394 transitions. [2021-02-23 19:15:14,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:15:14,973 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 417 [2021-02-23 19:15:14,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:15:14,996 INFO L225 Difference]: With dead ends: 5996 [2021-02-23 19:15:14,996 INFO L226 Difference]: Without dead ends: 3932 [2021-02-23 19:15:15,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 19:15:15,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3932 states. [2021-02-23 19:15:15,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 3930. [2021-02-23 19:15:15,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3930 states. [2021-02-23 19:15:15,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3930 states to 3930 states and 4803 transitions. [2021-02-23 19:15:15,421 INFO L78 Accepts]: Start accepts. Automaton has 3930 states and 4803 transitions. Word has length 417 [2021-02-23 19:15:15,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:15:15,423 INFO L480 AbstractCegarLoop]: Abstraction has 3930 states and 4803 transitions. [2021-02-23 19:15:15,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 19:15:15,423 INFO L276 IsEmpty]: Start isEmpty. Operand 3930 states and 4803 transitions. [2021-02-23 19:15:15,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2021-02-23 19:15:15,433 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:15:15,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:15:15,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 19:15:15,434 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:15:15,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:15:15,435 INFO L82 PathProgramCache]: Analyzing trace with hash 737743196, now seen corresponding path program 1 times [2021-02-23 19:15:15,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:15:15,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51840513] [2021-02-23 19:15:15,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:15:15,441 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:15:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:15:15,730 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:15,731 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:15,738 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:15,739 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:15:15,744 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:15,748 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 19:15:15,759 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:15,760 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:16,140 WARN L202 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-02-23 19:15:16,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:15:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:15:16,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:16,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:15:16,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51840513] [2021-02-23 19:15:16,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:15:16,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 19:15:16,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255931198] [2021-02-23 19:15:16,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 19:15:16,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:15:16,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 19:15:16,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:15:16,392 INFO L87 Difference]: Start difference. First operand 3930 states and 4803 transitions. Second operand 5 states. [2021-02-23 19:15:21,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:15:21,085 INFO L93 Difference]: Finished difference Result 11049 states and 13544 transitions. [2021-02-23 19:15:21,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:15:21,086 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 417 [2021-02-23 19:15:21,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:15:21,128 INFO L225 Difference]: With dead ends: 11049 [2021-02-23 19:15:21,129 INFO L226 Difference]: Without dead ends: 7378 [2021-02-23 19:15:21,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 19:15:21,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7378 states. [2021-02-23 19:15:21,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7378 to 7376. [2021-02-23 19:15:21,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7376 states. [2021-02-23 19:15:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7376 states to 7376 states and 8976 transitions. [2021-02-23 19:15:21,981 INFO L78 Accepts]: Start accepts. Automaton has 7376 states and 8976 transitions. Word has length 417 [2021-02-23 19:15:21,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:15:21,982 INFO L480 AbstractCegarLoop]: Abstraction has 7376 states and 8976 transitions. [2021-02-23 19:15:21,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 19:15:21,983 INFO L276 IsEmpty]: Start isEmpty. Operand 7376 states and 8976 transitions. [2021-02-23 19:15:21,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2021-02-23 19:15:21,997 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:15:21,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:15:21,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 19:15:21,998 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:15:21,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:15:21,999 INFO L82 PathProgramCache]: Analyzing trace with hash 902525339, now seen corresponding path program 1 times [2021-02-23 19:15:21,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:15:21,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399600436] [2021-02-23 19:15:22,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:15:22,003 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:15:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:15:22,105 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:22,106 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:22,107 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:22,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:15:22,116 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:22,117 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:22,413 WARN L202 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-02-23 19:15:22,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:15:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:15:22,444 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:22,445 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:15:22,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399600436] [2021-02-23 19:15:22,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:15:22,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 19:15:22,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122729414] [2021-02-23 19:15:22,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 19:15:22,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:15:22,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 19:15:22,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 19:15:22,674 INFO L87 Difference]: Start difference. First operand 7376 states and 8976 transitions. Second operand 4 states. [2021-02-23 19:15:28,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:15:28,003 INFO L93 Difference]: Finished difference Result 21545 states and 26264 transitions. [2021-02-23 19:15:28,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 19:15:28,003 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2021-02-23 19:15:28,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:15:28,091 INFO L225 Difference]: With dead ends: 21545 [2021-02-23 19:15:28,091 INFO L226 Difference]: Without dead ends: 14478 [2021-02-23 19:15:28,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 19:15:28,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14478 states. [2021-02-23 19:15:28,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14478 to 7386. [2021-02-23 19:15:28,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7386 states. [2021-02-23 19:15:28,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7386 states to 7386 states and 8986 transitions. [2021-02-23 19:15:29,000 INFO L78 Accepts]: Start accepts. Automaton has 7386 states and 8986 transitions. Word has length 418 [2021-02-23 19:15:29,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:15:29,001 INFO L480 AbstractCegarLoop]: Abstraction has 7386 states and 8986 transitions. [2021-02-23 19:15:29,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 19:15:29,001 INFO L276 IsEmpty]: Start isEmpty. Operand 7386 states and 8986 transitions. [2021-02-23 19:15:29,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-02-23 19:15:29,019 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:15:29,019 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:15:29,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 19:15:29,020 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:15:29,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:15:29,021 INFO L82 PathProgramCache]: Analyzing trace with hash -420860065, now seen corresponding path program 1 times [2021-02-23 19:15:29,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:15:29,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174982356] [2021-02-23 19:15:29,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:15:29,025 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:15:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:15:29,185 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:29,186 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:29,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:29,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 19:15:29,194 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:29,195 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:29,520 WARN L202 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-02-23 19:15:29,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:15:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:15:29,545 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:29,545 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:15:29,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174982356] [2021-02-23 19:15:29,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:15:29,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 19:15:29,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027629746] [2021-02-23 19:15:29,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 19:15:29,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:15:29,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 19:15:29,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 19:15:29,772 INFO L87 Difference]: Start difference. First operand 7386 states and 8986 transitions. Second operand 4 states. [2021-02-23 19:15:35,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:15:35,117 INFO L93 Difference]: Finished difference Result 20119 states and 24540 transitions. [2021-02-23 19:15:35,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 19:15:35,118 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 419 [2021-02-23 19:15:35,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:15:35,146 INFO L225 Difference]: With dead ends: 20119 [2021-02-23 19:15:35,147 INFO L226 Difference]: Without dead ends: 14057 [2021-02-23 19:15:35,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 19:15:35,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14057 states. [2021-02-23 19:15:36,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14057 to 14055. [2021-02-23 19:15:36,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14055 states. [2021-02-23 19:15:36,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14055 states to 14055 states and 17002 transitions. [2021-02-23 19:15:36,522 INFO L78 Accepts]: Start accepts. Automaton has 14055 states and 17002 transitions. Word has length 419 [2021-02-23 19:15:36,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:15:36,523 INFO L480 AbstractCegarLoop]: Abstraction has 14055 states and 17002 transitions. [2021-02-23 19:15:36,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 19:15:36,523 INFO L276 IsEmpty]: Start isEmpty. Operand 14055 states and 17002 transitions. [2021-02-23 19:15:36,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-02-23 19:15:36,550 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:15:36,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:15:36,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 19:15:36,551 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:15:36,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:15:36,552 INFO L82 PathProgramCache]: Analyzing trace with hash -156430369, now seen corresponding path program 1 times [2021-02-23 19:15:36,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:15:36,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819965043] [2021-02-23 19:15:36,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:15:36,556 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:15:36,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:15:36,721 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:36,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:36,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:36,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:15:36,730 WARN L141 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size [2021-02-23 19:15:36,733 WARN L147 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size 30 [2021-02-23 19:15:36,749 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:36,750 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 19:15:36,761 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:36,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:37,066 WARN L202 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-02-23 19:15:37,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:15:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:15:37,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:37,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:15:37,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819965043] [2021-02-23 19:15:37,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:15:37,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 19:15:37,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667877052] [2021-02-23 19:15:37,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 19:15:37,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:15:37,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 19:15:37,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 19:15:37,388 INFO L87 Difference]: Start difference. First operand 14055 states and 17002 transitions. Second operand 6 states. [2021-02-23 19:15:43,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:15:43,923 INFO L93 Difference]: Finished difference Result 39709 states and 48059 transitions. [2021-02-23 19:15:43,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:15:43,924 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 419 [2021-02-23 19:15:43,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:15:43,979 INFO L225 Difference]: With dead ends: 39709 [2021-02-23 19:15:43,979 INFO L226 Difference]: Without dead ends: 25939 [2021-02-23 19:15:44,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 19:15:44,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25939 states. [2021-02-23 19:15:46,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25939 to 25937. [2021-02-23 19:15:46,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25937 states. [2021-02-23 19:15:46,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25937 states to 25937 states and 31181 transitions. [2021-02-23 19:15:46,486 INFO L78 Accepts]: Start accepts. Automaton has 25937 states and 31181 transitions. Word has length 419 [2021-02-23 19:15:46,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:15:46,486 INFO L480 AbstractCegarLoop]: Abstraction has 25937 states and 31181 transitions. [2021-02-23 19:15:46,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 19:15:46,487 INFO L276 IsEmpty]: Start isEmpty. Operand 25937 states and 31181 transitions. [2021-02-23 19:15:46,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-02-23 19:15:46,526 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:15:46,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:15:46,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 19:15:46,527 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:15:46,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:15:46,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1584665826, now seen corresponding path program 1 times [2021-02-23 19:15:46,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:15:46,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135649376] [2021-02-23 19:15:46,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:15:46,532 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:15:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:15:46,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:46,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:46,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:46,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:15:46,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:46,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 19:15:46,701 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:46,702 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:46,993 WARN L202 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-02-23 19:15:46,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:15:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:15:47,018 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:47,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:47,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:15:47,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135649376] [2021-02-23 19:15:47,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:15:47,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 19:15:47,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880570722] [2021-02-23 19:15:47,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 19:15:47,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:15:47,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 19:15:47,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:15:47,211 INFO L87 Difference]: Start difference. First operand 25937 states and 31181 transitions. Second operand 5 states. [2021-02-23 19:15:54,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:15:54,183 INFO L93 Difference]: Finished difference Result 52196 states and 62712 transitions. [2021-02-23 19:15:54,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:15:54,184 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 419 [2021-02-23 19:15:54,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:15:54,234 INFO L225 Difference]: With dead ends: 52196 [2021-02-23 19:15:54,234 INFO L226 Difference]: Without dead ends: 27021 [2021-02-23 19:15:54,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 19:15:54,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27021 states. [2021-02-23 19:15:57,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27021 to 26491. [2021-02-23 19:15:57,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26491 states. [2021-02-23 19:15:57,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26491 states to 26491 states and 31782 transitions. [2021-02-23 19:15:57,275 INFO L78 Accepts]: Start accepts. Automaton has 26491 states and 31782 transitions. Word has length 419 [2021-02-23 19:15:57,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:15:57,276 INFO L480 AbstractCegarLoop]: Abstraction has 26491 states and 31782 transitions. [2021-02-23 19:15:57,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 19:15:57,276 INFO L276 IsEmpty]: Start isEmpty. Operand 26491 states and 31782 transitions. [2021-02-23 19:15:57,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2021-02-23 19:15:57,321 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:15:57,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:15:57,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 19:15:57,322 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:15:57,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:15:57,323 INFO L82 PathProgramCache]: Analyzing trace with hash -511422423, now seen corresponding path program 1 times [2021-02-23 19:15:57,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:15:57,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692285947] [2021-02-23 19:15:57,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:15:57,327 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:15:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:15:57,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:57,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:57,441 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:57,441 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 19:15:57,446 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:57,447 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:57,780 WARN L202 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-02-23 19:15:57,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:15:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:15:57,803 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:15:57,804 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:15:57,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:15:57,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692285947] [2021-02-23 19:15:57,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:15:57,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 19:15:57,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227198866] [2021-02-23 19:15:57,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 19:15:57,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:15:57,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 19:15:57,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 19:15:57,973 INFO L87 Difference]: Start difference. First operand 26491 states and 31782 transitions. Second operand 4 states. [2021-02-23 19:16:07,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:16:07,328 INFO L93 Difference]: Finished difference Result 76427 states and 91860 transitions. [2021-02-23 19:16:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 19:16:07,330 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 420 [2021-02-23 19:16:07,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:16:07,448 INFO L225 Difference]: With dead ends: 76427 [2021-02-23 19:16:07,449 INFO L226 Difference]: Without dead ends: 52165 [2021-02-23 19:16:07,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 19:16:07,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52165 states. [2021-02-23 19:16:10,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52165 to 26531. [2021-02-23 19:16:10,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26531 states. [2021-02-23 19:16:11,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26531 states to 26531 states and 31822 transitions. [2021-02-23 19:16:11,018 INFO L78 Accepts]: Start accepts. Automaton has 26531 states and 31822 transitions. Word has length 420 [2021-02-23 19:16:11,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:16:11,018 INFO L480 AbstractCegarLoop]: Abstraction has 26531 states and 31822 transitions. [2021-02-23 19:16:11,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 19:16:11,019 INFO L276 IsEmpty]: Start isEmpty. Operand 26531 states and 31822 transitions. [2021-02-23 19:16:11,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2021-02-23 19:16:11,036 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:16:11,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:16:11,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 19:16:11,037 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:16:11,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:16:11,038 INFO L82 PathProgramCache]: Analyzing trace with hash 218944805, now seen corresponding path program 1 times [2021-02-23 19:16:11,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:16:11,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960699176] [2021-02-23 19:16:11,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:16:11,041 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:16:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:16:11,182 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:16:11,183 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:16:11,184 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:16:11,184 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 19:16:11,189 WARN L141 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size [2021-02-23 19:16:11,190 WARN L147 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size 30 [2021-02-23 19:16:11,205 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:16:11,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 19:16:11,218 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:16:11,219 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:16:11,578 WARN L202 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-02-23 19:16:11,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:16:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:16:11,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:16:11,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:16:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:16:11,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960699176] [2021-02-23 19:16:11,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:16:11,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 19:16:11,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217059072] [2021-02-23 19:16:11,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 19:16:11,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:16:11,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 19:16:11,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 19:16:11,803 INFO L87 Difference]: Start difference. First operand 26531 states and 31822 transitions. Second operand 6 states. [2021-02-23 19:16:18,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:16:18,947 INFO L93 Difference]: Finished difference Result 54407 states and 65128 transitions. [2021-02-23 19:16:18,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 19:16:18,947 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 421 [2021-02-23 19:16:18,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:16:18,983 INFO L225 Difference]: With dead ends: 54407 [2021-02-23 19:16:18,983 INFO L226 Difference]: Without dead ends: 28505 [2021-02-23 19:16:19,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 19:16:19,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28505 states. [2021-02-23 19:16:22,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28505 to 27679. [2021-02-23 19:16:22,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27679 states. [2021-02-23 19:16:22,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27679 states to 27679 states and 33044 transitions. [2021-02-23 19:16:22,459 INFO L78 Accepts]: Start accepts. Automaton has 27679 states and 33044 transitions. Word has length 421 [2021-02-23 19:16:22,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:16:22,459 INFO L480 AbstractCegarLoop]: Abstraction has 27679 states and 33044 transitions. [2021-02-23 19:16:22,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 19:16:22,459 INFO L276 IsEmpty]: Start isEmpty. Operand 27679 states and 33044 transitions. [2021-02-23 19:16:22,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2021-02-23 19:16:22,478 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:16:22,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:16:22,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 19:16:22,479 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:16:22,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:16:22,479 INFO L82 PathProgramCache]: Analyzing trace with hash -749240384, now seen corresponding path program 1 times [2021-02-23 19:16:22,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:16:22,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769271819] [2021-02-23 19:16:22,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:16:22,483 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:16:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 19:16:22,538 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 19:16:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 19:16:22,598 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 19:16:23,341 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 19:16:23,341 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 19:16:23,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 19:16:23,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 07:16:23 BoogieIcfgContainer [2021-02-23 19:16:23,392 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 19:16:23,393 INFO L168 Benchmark]: Toolchain (without parser) took 97951.33 ms. Allocated memory was 157.3 MB in the beginning and 3.6 GB in the end (delta: 3.5 GB). Free memory was 133.0 MB in the beginning and 2.4 GB in the end (delta: -2.2 GB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-02-23 19:16:23,393 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 157.3 MB. Free memory is still 130.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 19:16:23,394 INFO L168 Benchmark]: CACSL2BoogieTranslator took 872.86 ms. Allocated memory is still 157.3 MB. Free memory was 131.8 MB in the beginning and 137.7 MB in the end (delta: -6.0 MB). Peak memory consumption was 32.8 MB. Max. memory is 8.0 GB. [2021-02-23 19:16:23,395 INFO L168 Benchmark]: Boogie Preprocessor took 122.67 ms. Allocated memory is still 157.3 MB. Free memory was 137.7 MB in the beginning and 134.1 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-02-23 19:16:23,395 INFO L168 Benchmark]: RCFGBuilder took 2139.96 ms. Allocated memory was 157.3 MB in the beginning and 196.1 MB in the end (delta: 38.8 MB). Free memory was 134.1 MB in the beginning and 95.3 MB in the end (delta: 38.8 MB). Peak memory consumption was 77.0 MB. Max. memory is 8.0 GB. [2021-02-23 19:16:23,396 INFO L168 Benchmark]: TraceAbstraction took 94793.12 ms. Allocated memory was 196.1 MB in the beginning and 3.6 GB in the end (delta: 3.4 GB). Free memory was 94.8 MB in the beginning and 2.4 GB in the end (delta: -2.3 GB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-02-23 19:16:23,399 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 157.3 MB. Free memory is still 130.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 872.86 ms. Allocated memory is still 157.3 MB. Free memory was 131.8 MB in the beginning and 137.7 MB in the end (delta: -6.0 MB). Peak memory consumption was 32.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 122.67 ms. Allocated memory is still 157.3 MB. Free memory was 137.7 MB in the beginning and 134.1 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 2139.96 ms. Allocated memory was 157.3 MB in the beginning and 196.1 MB in the end (delta: 38.8 MB). Free memory was 134.1 MB in the beginning and 95.3 MB in the end (delta: 38.8 MB). Peak memory consumption was 77.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 94793.12 ms. Allocated memory was 196.1 MB in the beginning and 3.6 GB in the end (delta: 3.4 GB). Free memory was 94.8 MB in the beginning and 2.4 GB in the end (delta: -2.3 GB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 834]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1] int __return_main; [L17] msg_t nomsg = (msg_t )-1; [L18] port_t p12 = 0; [L19] char p12_old = '\x0'; [L20] char p12_new = '\x0'; [L21] _Bool ep12 = 0; [L22] port_t p13 = 0; [L23] char p13_old = '\x0'; [L24] char p13_new = '\x0'; [L25] _Bool ep13 = 0; [L26] port_t p21 = 0; [L27] char p21_old = '\x0'; [L28] char p21_new = '\x0'; [L29] _Bool ep21 = 0; [L30] port_t p23 = 0; [L31] char p23_old = '\x0'; [L32] char p23_new = '\x0'; [L33] _Bool ep23 = 0; [L34] port_t p31 = 0; [L35] char p31_old = '\x0'; [L36] char p31_new = '\x0'; [L37] _Bool ep31 = 0; [L38] port_t p32 = 0; [L39] char p32_old = '\x0'; [L40] char p32_new = '\x0'; [L41] _Bool ep32 = 0; [L42] char id1 = '\x0'; [L43] unsigned char r1 = '\x0'; [L44] char st1 = '\x0'; [L45] char nl1 = '\x0'; [L46] char m1 = '\x0'; [L47] char max1 = '\x0'; [L48] _Bool mode1 = 0; [L49] char id2 = '\x0'; [L50] unsigned char r2 = '\x0'; [L51] char st2 = '\x0'; [L52] char nl2 = '\x0'; [L53] char m2 = '\x0'; [L54] char max2 = '\x0'; [L55] _Bool mode2 = 0; [L56] char id3 = '\x0'; [L57] unsigned char r3 = '\x0'; [L58] char st3 = '\x0'; [L59] char nl3 = '\x0'; [L60] char m3 = '\x0'; [L61] char max3 = '\x0'; [L62] _Bool mode3 = 0; [L66] void (*nodes[3])() = { &node1, &node2, &node3 }; [L70] int __return_1718; [L71] int __return_1846; [L72] int __return_1964; [L73] int __return_2082; [L74] int __return_2205; [L75] int __return_2315; [L78] int main__c1; [L79] int main__i2; [L80] main__c1 = 0 [L81] ep12 = __VERIFIER_nondet_bool() [L82] ep13 = __VERIFIER_nondet_bool() [L83] ep21 = __VERIFIER_nondet_bool() [L84] ep23 = __VERIFIER_nondet_bool() [L85] ep31 = __VERIFIER_nondet_bool() [L86] ep32 = __VERIFIER_nondet_bool() [L87] id1 = __VERIFIER_nondet_char() [L88] r1 = __VERIFIER_nondet_uchar() [L89] st1 = __VERIFIER_nondet_char() [L90] nl1 = __VERIFIER_nondet_char() [L91] m1 = __VERIFIER_nondet_char() [L92] max1 = __VERIFIER_nondet_char() [L93] mode1 = __VERIFIER_nondet_bool() [L94] id2 = __VERIFIER_nondet_char() [L95] r2 = __VERIFIER_nondet_uchar() [L96] st2 = __VERIFIER_nondet_char() [L97] nl2 = __VERIFIER_nondet_char() [L98] m2 = __VERIFIER_nondet_char() [L99] max2 = __VERIFIER_nondet_char() [L100] mode2 = __VERIFIER_nondet_bool() [L101] id3 = __VERIFIER_nondet_char() [L102] r3 = __VERIFIER_nondet_uchar() [L103] st3 = __VERIFIER_nondet_char() [L104] nl3 = __VERIFIER_nondet_char() [L105] m3 = __VERIFIER_nondet_char() [L106] max3 = __VERIFIER_nondet_char() [L107] mode3 = __VERIFIER_nondet_bool() [L109] _Bool init__r121; [L110] _Bool init__r131; [L111] _Bool init__r211; [L112] _Bool init__r231; [L113] _Bool init__r311; [L114] _Bool init__r321; [L115] _Bool init__r122; [L116] int init__tmp; [L117] _Bool init__r132; [L118] int init__tmp___0; [L119] _Bool init__r212; [L120] int init__tmp___1; [L121] _Bool init__r232; [L122] int init__tmp___2; [L123] _Bool init__r312; [L124] int init__tmp___3; [L125] _Bool init__r322; [L126] int init__tmp___4; [L127] int init__tmp___5; [L128] init__r121 = ep12 [L129] init__r131 = ep13 [L130] init__r211 = ep21 [L131] init__r231 = ep23 [L132] init__r311 = ep31 [L133] init__r321 = ep32 [L134] COND FALSE !(!(init__r121 == 0)) [L2246] COND FALSE !(!(init__r131 == 0)) [L2262] init__tmp = 0 [L138] init__r122 = (_Bool)init__tmp [L139] COND FALSE !(!(init__r131 == 0)) [L2223] COND FALSE !(!(init__r121 == 0)) [L2239] init__tmp___0 = 0 [L143] init__r132 = (_Bool)init__tmp___0 [L144] COND FALSE !(!(init__r211 == 0)) [L2200] COND FALSE !(!(init__r231 == 0)) [L2216] init__tmp___1 = 0 [L148] init__r212 = (_Bool)init__tmp___1 [L149] COND FALSE !(!(init__r231 == 0)) [L2177] COND FALSE !(!(init__r211 == 0)) [L2193] init__tmp___2 = 0 [L153] init__r232 = (_Bool)init__tmp___2 [L154] COND FALSE !(!(init__r311 == 0)) [L2154] COND FALSE !(!(init__r321 == 0)) [L2170] init__tmp___3 = 0 [L158] init__r312 = (_Bool)init__tmp___3 [L159] COND FALSE !(!(init__r321 == 0)) [L2131] COND FALSE !(!(init__r311 == 0)) [L2147] init__tmp___4 = 0 [L163] init__r322 = (_Bool)init__tmp___4 [L164] COND TRUE ((int)id1) != ((int)id2) [L166] COND TRUE ((int)id1) != ((int)id3) [L168] COND TRUE ((int)id2) != ((int)id3) [L170] COND TRUE ((int)id1) >= 0 [L172] COND TRUE ((int)id2) >= 0 [L174] COND TRUE ((int)id3) >= 0 [L176] COND TRUE ((int)r1) == 0 [L178] COND TRUE ((int)r2) == 0 [L180] COND TRUE ((int)r3) == 0 [L182] COND TRUE ((int)max1) == ((int)id1) [L184] COND TRUE ((int)max2) == ((int)id2) [L186] COND TRUE ((int)max3) == ((int)id3) [L188] COND TRUE ((int)st1) == 0 [L190] COND TRUE ((int)st2) == 0 [L192] COND TRUE ((int)st3) == 0 [L194] COND TRUE ((int)nl1) == 0 [L196] COND TRUE ((int)nl2) == 0 [L198] COND TRUE ((int)nl3) == 0 [L200] COND TRUE ((int)mode1) == 0 [L202] COND TRUE ((int)mode2) == 0 [L204] COND TRUE ((int)mode3) == 0 [L206] init__tmp___5 = 1 [L207] __return_1718 = init__tmp___5 [L208] main__i2 = __return_1718 [L209] COND TRUE main__i2 != 0 [L211] p12_old = nomsg [L212] p12_new = nomsg [L213] p13_old = nomsg [L214] p13_new = nomsg [L215] p21_old = nomsg [L216] p21_new = nomsg [L217] p23_old = nomsg [L218] p23_new = nomsg [L219] p31_old = nomsg [L220] p31_new = nomsg [L221] p32_old = nomsg [L222] p32_new = nomsg [L223] main__i2 = 0 [L225] COND FALSE !(!(mode1 == 0)) [L231] COND TRUE ((int)r1) < 2 [L233] COND FALSE !(!(ep12 == 0)) [L244] COND FALSE !(!(ep13 == 0)) [L255] mode1 = 1 [L257] COND FALSE !(!(mode2 == 0)) [L263] COND TRUE ((int)r2) < 2 [L265] COND FALSE !(!(ep21 == 0)) [L276] COND FALSE !(!(ep23 == 0)) [L287] mode2 = 1 [L289] COND FALSE !(!(mode3 == 0)) [L295] COND TRUE ((int)r3) < 2 [L297] COND FALSE !(!(ep31 == 0)) [L308] COND FALSE !(!(ep32 == 0)) [L319] mode3 = 1 [L320] p12_old = p12_new [L321] p12_new = nomsg [L322] p13_old = p13_new [L323] p13_new = nomsg [L324] p21_old = p21_new [L325] p21_new = nomsg [L326] p23_old = p23_new [L327] p23_new = nomsg [L328] p31_old = p31_new [L329] p31_new = nomsg [L330] p32_old = p32_new [L331] p32_new = nomsg [L333] int check__tmp; [L334] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L336] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L338] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L340] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L342] COND FALSE !(((int)r1) >= 2) [L348] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L350] COND TRUE ((int)r1) < 2 [L352] COND FALSE !(((int)r1) >= 2) [L358] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L360] COND TRUE ((int)r1) < 2 [L362] check__tmp = 1 [L363] __return_1846 = check__tmp [L364] main__c1 = __return_1846 [L366] _Bool __tmp_1; [L367] __tmp_1 = main__c1 [L368] _Bool assert__arg; [L369] assert__arg = __tmp_1 [L370] COND FALSE !(assert__arg == 0) [L377] COND TRUE !(mode1 == 0) [L379] COND FALSE !(r1 == 255) [L385] r1 = r1 + 1 [L386] COND FALSE !(!(ep21 == 0)) [L394] COND FALSE !(!(ep31 == 0)) [L402] COND FALSE !(((int)r1) == 2) [L408] mode1 = 0 [L410] COND TRUE !(mode2 == 0) [L412] COND FALSE !(r2 == 255) [L418] r2 = r2 + 1 [L419] COND FALSE !(!(ep12 == 0)) [L427] COND FALSE !(!(ep32 == 0)) [L435] COND FALSE !(((int)r2) == 2) [L441] mode2 = 0 [L443] COND TRUE !(mode3 == 0) [L445] COND FALSE !(r3 == 255) [L451] r3 = r3 + 1 [L452] COND FALSE !(!(ep13 == 0)) [L460] COND FALSE !(!(ep23 == 0)) [L468] COND FALSE !(((int)r3) == 2) [L474] mode3 = 0 [L475] p12_old = p12_new [L476] p12_new = nomsg [L477] p13_old = p13_new [L478] p13_new = nomsg [L479] p21_old = p21_new [L480] p21_new = nomsg [L481] p23_old = p23_new [L482] p23_new = nomsg [L483] p31_old = p31_new [L484] p31_new = nomsg [L485] p32_old = p32_new [L486] p32_new = nomsg [L488] int check__tmp; [L489] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L491] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L493] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L495] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L497] COND FALSE !(((int)r1) >= 2) [L503] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L505] COND TRUE ((int)r1) < 2 [L507] COND FALSE !(((int)r1) >= 2) [L513] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L515] COND TRUE ((int)r1) < 2 [L517] check__tmp = 1 [L518] __return_1964 = check__tmp [L519] main__c1 = __return_1964 [L521] _Bool __tmp_2; [L522] __tmp_2 = main__c1 [L523] _Bool assert__arg; [L524] assert__arg = __tmp_2 [L525] COND FALSE !(assert__arg == 0) [L532] COND FALSE !(!(mode1 == 0)) [L538] COND TRUE ((int)r1) < 2 [L540] COND FALSE !(!(ep12 == 0)) [L551] COND FALSE !(!(ep13 == 0)) [L562] mode1 = 1 [L564] COND FALSE !(!(mode2 == 0)) [L570] COND TRUE ((int)r2) < 2 [L572] COND FALSE !(!(ep21 == 0)) [L583] COND FALSE !(!(ep23 == 0)) [L594] mode2 = 1 [L596] COND FALSE !(!(mode3 == 0)) [L602] COND TRUE ((int)r3) < 2 [L604] COND FALSE !(!(ep31 == 0)) [L615] COND FALSE !(!(ep32 == 0)) [L626] mode3 = 1 [L627] p12_old = p12_new [L628] p12_new = nomsg [L629] p13_old = p13_new [L630] p13_new = nomsg [L631] p21_old = p21_new [L632] p21_new = nomsg [L633] p23_old = p23_new [L634] p23_new = nomsg [L635] p31_old = p31_new [L636] p31_new = nomsg [L637] p32_old = p32_new [L638] p32_new = nomsg [L640] int check__tmp; [L641] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) <= 1 [L643] COND TRUE (((int)st1) + ((int)nl1)) <= 1 [L645] COND TRUE (((int)st2) + ((int)nl2)) <= 1 [L647] COND TRUE (((int)st3) + ((int)nl3)) <= 1 [L649] COND FALSE !(((int)r1) >= 2) [L655] COND TRUE ((((int)st1) + ((int)st2)) + ((int)st3)) == 0 [L657] COND TRUE ((int)r1) < 2 [L659] COND FALSE !(((int)r1) >= 2) [L665] COND TRUE ((((int)nl1) + ((int)nl2)) + ((int)nl3)) == 0 [L667] COND TRUE ((int)r1) < 2 [L669] check__tmp = 1 [L670] __return_2082 = check__tmp [L671] main__c1 = __return_2082 [L673] _Bool __tmp_3; [L674] __tmp_3 = main__c1 [L675] _Bool assert__arg; [L676] assert__arg = __tmp_3 [L677] COND FALSE !(assert__arg == 0) [L684] COND TRUE !(mode1 == 0) [L686] COND FALSE !(r1 == 255) [L692] r1 = r1 + 1 [L693] COND FALSE !(!(ep21 == 0)) [L701] COND FALSE !(!(ep31 == 0)) [L709] COND TRUE ((int)r1) == 2 [L711] COND TRUE ((int)max1) == ((int)id1) [L713] st1 = 1 [L715] mode1 = 0 [L717] COND TRUE !(mode2 == 0) [L719] COND FALSE !(r2 == 255) [L725] r2 = r2 + 1 [L726] COND FALSE !(!(ep12 == 0)) [L734] COND FALSE !(!(ep32 == 0)) [L742] COND TRUE ((int)r2) == 2 [L744] COND TRUE ((int)max2) == ((int)id2) [L746] st2 = 1 [L748] mode2 = 0 [L750] COND TRUE !(mode3 == 0) [L752] COND FALSE !(r3 == 255) [L758] r3 = r3 + 1 [L759] COND FALSE !(!(ep13 == 0)) [L767] COND FALSE !(!(ep23 == 0)) [L775] COND TRUE ((int)r3) == 2 [L777] COND TRUE ((int)max3) == ((int)id3) [L779] st3 = 1 [L781] mode3 = 0 [L782] p12_old = p12_new [L783] p12_new = nomsg [L784] p13_old = p13_new [L785] p13_new = nomsg [L786] p21_old = p21_new [L787] p21_new = nomsg [L788] p23_old = p23_new [L789] p23_new = nomsg [L790] p31_old = p31_new [L791] p31_new = nomsg [L792] p32_old = p32_new [L793] p32_new = nomsg [L795] int check__tmp; [L796] COND FALSE !(((((int)st1) + ((int)st2)) + ((int)st3)) <= 1) [L1435] check__tmp = 0 [L824] __return_2205 = check__tmp [L825] main__c1 = __return_2205 [L828] _Bool __tmp_4; [L829] __tmp_4 = main__c1 [L830] _Bool assert__arg; [L831] assert__arg = __tmp_4 [L832] COND TRUE assert__arg == 0 [L834] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 829 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 94.6s, OverallIterations: 12, TraceHistogramMax: 1, AutomataDifference: 67.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 16123 SDtfs, 12534 SDslu, 11565 SDs, 0 SdLazy, 16569 SolverSat, 128 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 37.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27679occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 16.4s AutomataMinimizationTime, 11 MinimizatonAttempts, 35152 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...